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// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "Win32SurfaceKHR.hpp"
#include "Vulkan/VkDeviceMemory.hpp"
#include "Vulkan/VkDebug.hpp"
#include <string.h>
namespace vk {
Win32SurfaceKHR::Win32SurfaceKHR(const VkWin32SurfaceCreateInfoKHR *pCreateInfo, void *mem) :
hwnd(pCreateInfo->hwnd)
{
ASSERT(IsWindow(hwnd) == TRUE);
RECT clientRect = {};
BOOL status = GetClientRect(hwnd, &clientRect);
ASSERT(status != 0);
windowContext = GetDC(hwnd);
bitmapContext = CreateCompatibleDC(windowContext);
BITMAPINFO bitmapInfo = {};
bitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFO);
bitmapInfo.bmiHeader.biBitCount = 32;
bitmapInfo.bmiHeader.biPlanes = 1;
bitmapInfo.bmiHeader.biHeight = clientRect.top - clientRect.bottom;
bitmapInfo.bmiHeader.biWidth = clientRect.right - clientRect.left;
bitmapInfo.bmiHeader.biCompression = BI_RGB;
bitmap = CreateDIBSection(bitmapContext, &bitmapInfo, DIB_RGB_COLORS, &framebuffer, 0, 0);
ASSERT(bitmap != NULL);
SelectObject(bitmapContext, bitmap);
}
void Win32SurfaceKHR::destroySurface(const VkAllocationCallbacks *pAllocator)
{
SelectObject(bitmapContext, NULL);
DeleteObject(bitmap);
ReleaseDC(hwnd, windowContext);
DeleteDC(bitmapContext);
}
size_t Win32SurfaceKHR::ComputeRequiredAllocationSize(const VkWin32SurfaceCreateInfoKHR *pCreateInfo)
{
return 0;
}
void Win32SurfaceKHR::getSurfaceCapabilities(VkSurfaceCapabilitiesKHR *pSurfaceCapabilities) const
{
SurfaceKHR::getSurfaceCapabilities(pSurfaceCapabilities);
RECT clientRect = {};
BOOL status = GetClientRect(hwnd, &clientRect);
ASSERT(status != 0);
int windowWidth = clientRect.right - clientRect.left;
int windowHeight = clientRect.bottom - clientRect.top;
VkExtent2D extent = {static_cast<uint32_t>(windowWidth), static_cast<uint32_t>(windowHeight)};
pSurfaceCapabilities->currentExtent = extent;
pSurfaceCapabilities->minImageExtent = extent;
pSurfaceCapabilities->maxImageExtent = extent;
}
void Win32SurfaceKHR::attachImage(PresentImage* image)
{
// Nothing to do here, the current implementation based on GDI blits on
// present instead of associating the image with the surface.
}
void Win32SurfaceKHR::detachImage(PresentImage* image)
{
// Nothing to do here, the current implementation based on GDI blits on
// present instead of associating the image with the surface.
}
void Win32SurfaceKHR::present(PresentImage* image)
{
if(!framebuffer)
{
return;
}
VkExtent3D extent = image->getImage()->getMipLevelExtent(VK_IMAGE_ASPECT_COLOR_BIT, 0);
// FIXME(b/139184291): Assumes B8G8R8A8 surface without stride padding.
size_t bytes = extent.width * extent.height * 4;
memcpy(framebuffer, image->getImageMemory()->getOffsetPointer(0), bytes);
StretchBlt(windowContext, 0, 0, extent.width, extent.height, bitmapContext, 0, 0, extent.width, extent.height, SRCCOPY);
}
}